US 12,411,189 B2
Optical measuring device and method for plasma magnetic field with adjustable sensitivity
Jian Wu, Xi'an (CN); Zhiyuan Jiang, Xi'an (CN); Ziwei Chen, Xi'an (CN); Zhenyu Wang, Xi'an (CN); Wei Wang, Xi'an (CN); Xinmiao Zhou, Xi'an (CN); Huantong Shi, Xi'an (CN); and Xingwen Li, Xi'an (CN)
Assigned to XI'AN JIAOTONG UNIVERSITY, Xi'an (CN)
Filed by XI'AN JIAOTONG UNIVERSITY, Xi'an (CN)
Filed on Nov. 9, 2023, as Appl. No. 18/505,162.
Application 18/505,162 is a continuation of application No. PCT/CN2022/099531, filed on Jun. 17, 2022.
Claims priority of application No. 202210339809.1 (CN), filed on Apr. 1, 2022.
Prior Publication US 2024/0077549 A1, Mar. 7, 2024
Int. Cl. G01R 33/032 (2006.01)
CPC G01R 33/0322 (2013.01) 10 Claims
OG exemplary drawing
 
1. An optical measuring device for a plasma magnetic field with adjustable sensitivity, comprising a pulsed laser (1), a pulsed laser beam (2), a polarizer (3), a first beam splitter (4), a plasma (5), a second beam splitter (6), a third beam splitter (7), a fourth beam splitter (8), a first mirror (9), a second mirror (10), a fifth beam splitter (11), a first polarization analyzer (12), a second polarization analyzer (13), a first camera (14), a second camera (15), a third camera (16) and a fourth camera (17);
wherein the pulsed laser (1) is configured as a light source to emit the pulsed laser beam (2), the pulsed laser beam (2) emitted by the pulsed laser (1) passes through the plasma (5) via the polarizer (3) and enters the third beam splitter (7) for beam splitting, the pulsed laser beam (2) reflected by the third beam splitter (7) passes through the first polarization analyzer (12) and enters the second camera (15), the pulsed laser beam (2) transmitted by the third beam splitter (7) enters the fourth beam splitter (8) for beam splitting, the pulsed laser beam (2) reflected by the fourth beam splitter (8) passes through the second polarization analyzer (13) and enters the third camera (16), and the pulsed laser beam (2) transmitted by the fourth beam splitter (8) enters the fourth camera (17) via the first mirror (9); and
wherein the pulsed laser beam (2) emitted by the pulsed laser (1) passes through the first beam splitter (4) via the polarizer (3) for beam splitting, the pulsed laser beam (2) transmitted by the first beam splitter (4) passes through the plasma (5) and the second beam splitter (6) in turn, the pulsed laser beam (2) reflected by the second beam splitter (6) enters the fifth beam splitter (11), the pulsed laser beam (2) reflected by the first beam splitter (4) passes through the second mirror (10) and enters the fifth beam splitter (11), and two beams entering the fifth beam splitter (11) enter the first camera (14) together.